pixelpipe: added filter annotation to disable plugins on export
denoise: add buttons and stubs of background jobs.
denoise: write out seed images halfway through the pipe as pfm.
denoise: two new files to encapsulate the denoising code.
denoise: some support code.
denoise: compile fixes (tmp)
denoise: this works, is slow and somewhat underwhelming.
denoise: added edge buffers + blurring (buggy)
denoise: add downsized prior accumulation.
superres: initial plugin stub.
superres: upsize using almost naive upsampling first.
superres: added rough outline of the algo.
superres: some debugging work.
superres: a few bugfixes. still sucks.
Filter when tryping in the entry and the view is in folders mode

Properly filter the tree, and don't hide matching childs because
the parent node doesn't match and is hidden.
Reducing the times changed_callback function is called
Clarify code for each mode (folders/rest)
Sync
Merge branch 'master' into superres

Conflicts:
	src/control/jobs/control_jobs.h
denoise: bilateral with better sigma estimates.